function timer() {
	var choice1_button = document.getElementById("play_choice1");
	var choice2_button = document.getElementById("play_choice2");
	var choice3_button = document.getElementById("play_choice3");
	var choice4_button = document.getElementById("play_choice4");
	
	choice1_button.style.display='none';
	choice2_button.style.display='none';

	if (choice3_button != null && choice4_button != null) {
		choice3_button.style.display='none';
		choice4_button.style.display='none';
	}
	
	showGenerateNewQuestionButton()
	showNotification()
	showTimesUpMessage()
}

function showNotification() {
	document.getElementById("notification_top_box").style.display='block';
}

function hideNotification() {
	document.getElementById("notification_top_box").style.display='none';
}

function showGenerateNewQuestionButton() {
	document.getElementById("generate_new_question").style.display='';
}

function showTimesUpMessage() {
	document.getElementById("single_player_times_up").style.display='block';
}

function hideTimesUpMessage() {
	document.getElementById("single_player_times_up").style.display='';
}